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Finding the Fourth Proportional to 3,319.66, 4,980.02 and 1,128.52

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Solution

The fourth proportional to 3,319.66, 4,980.02 and 1,128.52 is: 1,692.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.66 : 4,980.02 = 1,128.52 : x
  2. Step 2: Convert to fraction form
    3,319.66/4,980.02 = 1,128.52/x
  3. Step 3: Cross multiply
    3,319.66x = 4,980.02 × 1,128.52
  4. Step 4: Simplify right side
    3,319.66x = 5,620,052.17
  5. Step 5: Solve for x
    x = 5,620,052.17/3,319.66
  6. Step 6: Final answer
    x = 1,692.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.